[jit] Add MutableTypePtrHelper::mapTypeToBorrowedAliasTypeSet (#65344)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65344
Callsites that know they are using a cache can borrow AliasTypeSets from the cache instead of copying them.
ghstack-source-id: 140484162
Test Plan: Running perf on static runtime startup seems to show less inclusive time spent in AliasDb::getElements
Reviewed By: ejguan
Differential Revision: D31027363
fbshipit-source-id: b7a1473f4f9e9f14566f56f4b3b4e6317076beeb
